https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97194
--- Comment #14 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
I see, there are more weaknesses than I thought. For CSE (or rather fwprop?) I
was thinking about a simpler case where the extracted-from value is loaded from
memory, but even in trivial cases RTL optimizers cannot clean it up today (so
it wouldn't get any better with separate temporaries):
#define N 16
typedef int T;
typedef T V __attribute__((vector_size(N)));
T f(V *px, long i)
{
V x = *px;
return x[i];
}
f:
movdqa (%rdi), %xmm0
movaps %xmm0, -24(%rsp)
movl -24(%rsp,%rsi,4), %eax
ret
